 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui;

 /**
  * Default implementation of INavigationLocation.
  *
  * @since 2.1
  */
 public abstract class NavigationLocation implements INavigationLocation {

     private IWorkbenchPage page;

     private IEditorInput input;

     /**
      * Constructs a NavigationLocation with its editor part.
      *
      * @param editorPart
      */
     protected NavigationLocation(IEditorPart editorPart) {
         this.page = editorPart.getSite().getPage();
         this.input = editorPart.getEditorInput();
     }

     /**
      * Returns the part that the receiver holds the location for.
      *
      * @return IEditorPart
      */
     protected IEditorPart getEditorPart() {
         if (input == null) {
             return null;
         }
         return page.findEditor(input);
     }

     /*
      * (non-Javadoc)
      * Method declared on INavigationLocation.
      */
     public Object getInput() {
         return input;
     }

     /*
      * (non-Javadoc)
      * Method declared on INavigationLocation.
      */
     public String getText() {
         IEditorPart part = getEditorPart();
         if (part == null) {
             return new String ();
         }
         return part.getTitle();
     }

     /*
      * (non-Javadoc)
      * Method declared on INavigationLocation.
      */
     public void setInput(Object input) {
         this.input = (IEditorInput) input;
     }

     /**
      * May be extended by clients.
      *
      * @see org.eclipse.ui.INavigationLocation#dispose()
      */
     public void dispose() {
         releaseState();
     }

     /**
      * May be extended by clients.
      *
      * @see org.eclipse.ui.INavigationLocation#releaseState()
      */
     public void releaseState() {
         input = null;
     }
 }

